diff --git a/tools/redis_import/README.md b/tools/redis_import/README.md
index e36b629..44ee28a 100644
--- a/tools/redis_import/README.md
+++ b/tools/redis_import/README.md
@@ -1,8 +1,19 @@
 ## Notice
 
-1. We don't support `set` data type.
+1. The tool doesn't support `set` data type.
+2. The tool doesn't support `bitmap` data type.
 2. Our `zset` use integer instead of double, so the zset float score in Redis 
    will be **converted to integer**.
 3. Only Support Redis version greater than  `2.8.0`, because we use `scan` command to scan data.
-   Also, you need `redis-py` greater than `2.9.0`
+   Also, you need `redis-py` greater than `2.9.0`.
 
+
+
+## Usage
+
+
+       $ python redis_import.py redis_host redis_port redis_db ledis_host ledis_port [True]
+
+The option `True` means convert `set` to `zset` or not, if not, set it to `False`.
+
+We will use the same db index as redis. That's to say, data in redis[0] will be transfer to ledisdb[0].
\ No newline at end of file
diff --git a/tools/redis_import/redis_import.py b/tools/redis_import/redis_import.py
index 820487b..b3d0cfa 100644
--- a/tools/redis_import/redis_import.py
+++ b/tools/redis_import/redis_import.py
@@ -95,6 +95,8 @@ def copy_keys(redis_client, ledis_client, keys, convert=False):
 def scan(redis_client, count=1000):
     keys = []
     total = redis_client.dbsize()
+    if total > 1000:
+        print "It may take a while, be patient please."
 
     first = True
     cursor = 0
@@ -102,14 +104,13 @@ def scan(redis_client, count=1000):
         cursor, data = redis_client.scan(cursor, count=count)
         keys.extend(data)
         first = False
-    print len(keys)
-    print total
     assert len(keys) == total
     return keys, total
 
 
 def copy(redis_client, ledis_client, count=1000, convert=False):
     if scan_available(redis_client):
+        print "\nTransfer begin ...\n"
         keys, total = scan(redis_client, count=count)
         copy_keys(redis_client, ledis_client, keys, convert=convert)
 
@@ -138,6 +139,18 @@ def usage():
     print usage % os.path.basename(sys.argv[0])
 
 
+def get_prompt(choice):
+    yes = set(['yes', 'ye', 'y', ''])
+    no = set(['no', 'n'])
+
+    if choice in yes:
+        return True
+    elif choice in no:
+        return False
+    else:
+        sys.stdout.write("Please respond with 'yes' or 'no'")
+
+
 def main():
     if len(sys.argv) < 6:
         usage()
@@ -148,6 +161,10 @@ def main():
         if len(sys.argv) == 7 and sys.argv[-1] == "True" or sys.argv[-1] == "true":
             convert = True
 
+    choice = raw_input("[y/N]").lower()
+    if not get_prompt(choice):
+        sys.exit("No proceed")
+
     redis_c = redis.Redis(host=redis_host, port=int(redis_port), db=int(redis_db))
     ledis_c = ledis.Ledis(host=ledis_host, port=int(ledis_port), db=int(redis_db))
     try:
@@ -163,7 +180,7 @@ def main():
         sys.exit()
 
     copy(redis_c, ledis_c, convert=convert)
-    print "done\n"
+    print "Done\n"
 
 
 if __name__ == "__main__":
diff --git a/tools/redis_import/test.py b/tools/redis_import/test.py
index a7f7f09..4e77efc 100644
--- a/tools/redis_import/test.py
+++ b/tools/redis_import/test.py
@@ -132,7 +132,6 @@ def test_ttl():
         #     invalid.append(key)
 
         assert rds.ttl(key) == ledis_ttl(lds, key, k_type)
-    print len(invalid)
 
 if __name__ == "__main__":
     test()